RTX 5070 Ti vs RTX 5080: Same GB203 Die, 14 SMs and 60 W Apart. Is the Gap Worth It?

Published October 27, 2026 · Independent guide by RTX 50 Series

Two cards, one die

Understanding what the cards share explains why the gap is smaller than the names suggest.

Shared architecture

Both cards use the GB203 die. It contains the memory controllers, L2 cache, media engines, display engine and the array of SMs. The RTX 5080 uses a nearly full configuration with 84 SMs. The RTX 5070 Ti disables 14 of them, leaving 70. Everything outside the SMs is the same, so the cards share a 256-bit interface, 16 GB of GDDR7, DisplayPort 2.1b and HDMI 2.1b outputs, and the full RTX 50 feature set. The guide to GB202 to GB207 chips explains this binning.

What the SM difference means

Each SM holds 128 CUDA cores, four Tensor cores, an RT core and four texture units. The RTX 5080 therefore has 10,752 CUDA cores, 336 Tensor cores and 84 RT cores. The RTX 5070 Ti has 8,960, 280 and 70. The ratio is 84 divided by 70, which is 1.20.

What the memory difference means

Both cards use eight 2 GB GDDR7 modules on a 256-bit bus. The RTX 5080 runs its memory faster, reaching 960 GB/s against 896 GB/s for the RTX 5070 Ti, a ratio of about 1.07.

The specification comparison

Reading the ratios

Ratios reveal where each card spends its budget.

Compute versus delivered performance

The RTX 5080 has 20 percent more compute and 20 percent more rated power, yet it scores about 16 percent higher on the relative chart. Real games do not scale perfectly with SM count, because memory, cache, geometry and the processor limit scaling. A gap of 16 percent is typical for this kind of configuration difference.

Efficiency

Dividing rated power by relative score gives about 5.26 watts per point for the RTX 5070 Ti and about 5.45 for the RTX 5080. The cards sit close together, with the RTX 5070 Ti slightly ahead on this crude measure. It is an indicator based on rated power, not a measured efficiency figure.

Bandwidth per core

The RTX 5070 Ti has more bandwidth per CUDA core, so in bandwidth-bound scenes it keeps up better than its compute deficit suggests. This helps explain why the performance gap is smaller than the compute gap.

The relative chart caveat

The scores come from the chart on the site's RTX 5090 specifications page, which gives aggregate figures with no stated resolution. Game-by-game results will differ, so use the chart as a guide and check tests of your own games.

When the extra 16 percent matters

Whether the gap matters depends on how close you are to a threshold.

Frame rate thresholds

A 16 percent gain turns 100 frames per second into 116, 120 into about 139, and 60 into about 70. It matters when a game sits just below a target, such as 60 or 120, and the extra performance pushes it over. If the card already exceeds your target, the gap is invisible.

Resolution scaling

At 4K, the heavier load makes the compute gap more visible, and the RTX 5080's extra SMs help most. At 1440p, many games are limited by the processor or by frame caps, and the difference shrinks. The site's RTX 5070 versus RTX 5080 test at 1440p gives a real-game look at tier gaps.

Ray tracing and path tracing

Ray-traced games scale with RT cores and cache, and path tracing is the most demanding workload. The RTX 5080's 84 RT cores help in these games, as the explainer on ray tracing versus path tracing shows.

A cost-per-point method

Prices change, so use a formula instead of a number.

The formula

Divide the card's current UK price by its relative performance score. For example, if a hypothetical RTX 5070 Ti costs 700 and scores 57, the cost per point is about 12.28. If a hypothetical RTX 5080 costs 900 and scores 66, the cost per point is about 13.64. These prices are examples only. Substitute real prices from UK retailers in the week you buy.

Interpreting the result

A lower cost per point means more performance per pound at the chart's average. The better value card is usually the one with the lower number, unless you need the higher card's headroom.

Add running costs

The RTX 5080 draws 60 W more at its rated limit. Over 1,000 hours of heavy gaming, that is 60 kilowatt-hours, which costs about £18 at a hypothetical 30 pence per kilowatt-hour. Include this in the comparison if you play a lot.

Power supply, case and cooling

The extra 60 W has physical consequences.

Supply

Retailers commonly list 750 W for the RTX 5070 Ti and 850 W for the RTX 5080, which reflects the higher rating. Check the product page for your card, and see the guide to high-wattage supplies.

Cooler and case

The RTX 5080 generally comes with larger coolers, which need more space and airflow. Measure the card against your case, and check the temperature guidance in the RTX 5080 temperature guide.

Noise

A larger cooler can offset the extra heat, so noise may be similar. Read noise measurements for the exact partner model.

Detailed workload comparison

Different workloads respond differently to the SM and bandwidth gap.

Rasterised games

Traditional games scale well with SM count until memory or the processor limits them. Expect a result near the compute ratio at 4K and a smaller one at 1440p, where frame caps and processor limits compress differences.

Ray-traced games

RT cores, cache and bandwidth all matter. The RTX 5080's 84 RT cores deliver more intersection throughput, and the gap typically widens a little as ray tracing complexity rises. Path tracing magnifies it further.

DLSS and frame generation

Tensor throughput scales with SM count, so the RTX 5080 completes DLSS and frame generation work faster. This leaves more of the frame budget for shading. The effect is small per frame, and it matters most at high refresh rates and high multipliers, as the guides to DLSS 4 and Multi Frame Generation explain.

Creative and AI workloads

Both cards have 16 GB of VRAM, so model and scene size limits are identical. The RTX 5080 finishes the same job faster, because it has more compute and slightly more bandwidth. For local AI, token generation speed depends mainly on bandwidth, so the gap is about 7 percent there. The complete RTX 5070 Ti guide explains the memory arithmetic for AI models.

Overclocking and tuning behaviour

Tuning potential depends on headroom.

Power limits

The RTX 5070 Ti has a 300 W rating, and many partner cards allow a modest increase. The RTX 5080's 360 W gives more absolute headroom, though high-end partner cards are also close to their limits. Read the guides to RTX 5070 Ti overclocking and RTX 5080 overclocking.

Undervolting

Both cards respond to voltage curve undervolts. The RTX 5080 draws more power, so an undervolt can save more watts, while the RTX 5070 Ti benefits in quiet and heat. See the guides to RTX 5070 Ti undervolting and RTX 5080 undervolting.

An undervolted RTX 5080 versus a stock RTX 5070 Ti

An undervolted RTX 5080 can approach the stock power draw of an RTX 5070 Ti while keeping more of its performance. The trade is time spent tuning, and the result depends on your sample.

Platform and compatibility

Several practical issues apply to both.

PCIe and platform

Both use a PCIe 5.0 x16 link, which works in PCIe 4.0 and 3.0 slots with small losses in most games, as the article on PCIe 5.0 motherboards explains.

Processor pairing

At 1440p, the RTX 5080 is more likely to be limited by the processor, so pair it with a capable processor to see its advantage. The guide to CPU and system bottlenecks covers diagnosis.

Monitors

If your monitor is 1440p at 144 Hz or lower, the RTX 5070 Ti is often enough. If you have a 4K 120 Hz or faster display, or a 1440p 240 Hz display, the RTX 5080's headroom becomes more valuable.

Connectors and cables

Both use modern power connectors on many partner models, so check the product page and use quality cables, as the guide to dedicated GPU cables explains.

Scenarios: which card for which buyer

Match the card to the situation.

Scenario one: 1440p at 165 Hz

A player with a 165 Hz 1440p monitor wants high settings. The RTX 5070 Ti typically reaches that range with DLSS in demanding games, and the RTX 5080 gives a bit more margin. Unless budget is no object, the RTX 5070 Ti is the sensible choice.

Scenario two: 4K at 120 Hz

A player with a 4K 120 Hz television wants ray tracing in new games. Both cards rely on DLSS and frame generation. The RTX 5080's 16 percent extra helps keep 1% lows up, and it may be worth the premium.

Scenario three: a compact, quiet build

A small case with limited airflow favours the 300 W card. The RTX 5070 Ti with an undervolt is easier to cool and quieter.

Scenario four: a creative and gaming mix

Both have 16 GB. If your creative work is time-sensitive, the RTX 5080 saves minutes per job. If it is occasional, the RTX 5070 Ti is enough.

Scenario five: planning to keep the card for years

Headroom extends useful life modestly, but VRAM is identical, so the RTX 5080's advantage lies in compute, not capacity. If VRAM is your concern, neither card helps more than the other.

Value maths with a worked example

A table shows how to apply the cost-per-point method, using illustrative numbers.

What the table shows

In this illustrative case, each extra point on the RTX 5080 costs about 22.2, compared with about 12.3 for each point the RTX 5070 Ti delivers. The marginal cost of the upgrade is nearly double the average, which is typical, since top-of-range parts cost more per unit of performance. Replace the example prices with real ones, and the same arithmetic applies.

When the premium is justified

The premium is justified when the extra headroom prevents a specific problem you have, such as missing a frame rate target by a few percent, and the price difference is small.

What neither card changes

Both have limits.

Native 4K with maximum ray tracing

Neither card runs the heaviest games at native 4K and maximum ray tracing smoothly. DLSS bridges the gap, as the guide to DLSS quality modes explains.

VRAM ceiling

Both have 16 GB. For very large mods or AI models, you may need more, and the RTX 5090 offers 32 GB.

Processor limits

A faster card does not help in processor-bound games, so check usage before you upgrade.

Memory subsystem: why 16 GB on 256 bits behaves the same

Both cards use the same memory arrangement, which is why capacity-limited behaviour is identical.

Channels and modules

A 256-bit bus is built from eight 32-bit channels, each served by one GDDR7 module. With 2 GB modules, eight channels give 16 GB. The memory controllers sit on the GB203 die, and both cards enable all of them, which is why neither is capacity-limited relative to the other.

Bandwidth arithmetic

Bandwidth equals bus width in bits divided by eight, multiplied by the per-pin data rate in gigabits per second. For the RTX 5080, 256 divided by 8 is 32 bytes, and multiplied by 30 Gbps gives 960 GB/s. For the RTX 5070 Ti, 32 multiplied by 28 Gbps gives 896 GB/s. The 7 percent gap is purely the data rate.

L2 cache

Both cards rely on a large L2 cache to reduce traffic to memory. Cache hit rates affect effective bandwidth, and this is one reason performance does not scale one-to-one with raw bandwidth.

Capacity pressure

If a game exceeds 16 GB, both cards spill into system memory over PCIe, and both suffer stutter. The extra compute of the RTX 5080 does not save it. In such cases, lowering texture quality helps either card equally.

Thermal and acoustic behaviour in practice

Higher power produces more heat, but cooler design shapes the result.

Heat flux

The GB203 die has the same area on both cards, so the extra 60 W on the RTX 5080 raises heat flux. The cooler must move more heat through the same contact area. Partner designs compensate with larger vapour chambers and more heat pipes, which is why many RTX 5080 models are thicker than RTX 5070 Ti models.

Fan behaviour

Fans spin faster as temperature rises. A larger cooler spins slower at the same heat output, which is why a big RTX 5080 can be as quiet as a small RTX 5070 Ti. Compare measured noise for particular models, not for the GPU tier alone, and read the guide to GPU fan curves.

Hot spot and memory temperature

Check hot spot and memory temperatures as well as core temperature. A cooler that handles the core well may let memory run warm, and the RTX 5080 temperature guide explains the ranges to expect.

How binning produces two products from one die

Semiconductor yield explains the lineup.

Why SMs are disabled

A large die has a chance of containing a defect. Instead of discarding dies with a defective SM, a manufacturer disables the faulty block and sells the die as a lower tier. The RTX 5070 Ti uses GB203 dies that have 70 working SMs enabled, while the RTX 5080 needs a die with 84 good SMs. Some dies could technically run more SMs, yet lineup segmentation sets the final count.

Consequences for buyers

Because both cards share the memory system, display engine and encoders, features such as DisplayPort 2.1b, the dual encoders and the same PCIe interface are the same. Differences come down to SM count, clock and power targets, and memory speed.

Clock behaviour

Boost clocks depend on the sample, cooling and power limit. Reference boost figures are a guide, and partner cards often boost higher than the figure on the box. A well-cooled RTX 5070 Ti can sustain clocks that narrow the gap slightly, while still short of the RTX 5080.

Workload deep dive: where 84 SMs pull ahead

The advantage is not uniform across tasks.

Compute-bound scenes

Scenes heavy on shader arithmetic, such as complex materials and lighting at 4K, scale closest to the SM ratio. Here, the RTX 5080 approaches 20 percent faster.

Bandwidth-bound scenes

Scenes with large textures and many render targets lean on memory bandwidth. The 7 percent advantage limits how far the RTX 5080 pulls ahead.

Processor-bound scenes

Competitive shooters at 1080p or 1440p with very high frame rates are limited by the processor, and the cards perform nearly the same.

Mixed workloads

Real games blend all three, which is why the observed gap of about 16 percent falls between the 7 percent bandwidth ratio and the 20 percent compute ratio.

Encoding and streaming

Both cards use the same media engines on GB203. Streaming and recording quality are equal, and the RTX 5080 has slightly more spare compute for running a game while encoding. The guide to NVENC and AV1 streaming discusses the encoder.

Test method: compare the cards yourself

If you can try both cards, or compare reviews, follow a consistent method.

Choose representative games

Pick three games with different loads: a ray-traced showcase, a rasterised title and a competitive title. Record settings and resolution.

Match the conditions

Use the same processor, memory, driver and room temperature. Run each scene for at least a minute, repeat three times and take the median.

Compare 1% lows

Average frame rate hides stutter. Compare the 1% lows and the frame-time graph, and note the power draw and temperature during the run.

Convert to a decision

Compute the percentage difference in 1% lows, divide the price premium by the percentage gain and compare it with your threshold for paying more.

Display connectivity and features

Both cards share the display engine, so connectivity is equal.

Ports and standards

Partner cards usually provide three DisplayPort 2.1b outputs and one HDMI 2.1b output. DisplayPort 2.1b supports very high bandwidth, which lets you drive a 4K display at a high refresh rate with fewer compression steps. Check your monitor's supported standard, because a display with DisplayPort 1.4 will not use the extra bandwidth.

Multi-monitor and VR

Multiple monitors are supported on both cards, though driving several high-refresh displays raises idle power. For virtual reality, the RTX 5080 has more headroom for supersampling, while the RTX 5070 Ti handles most headsets well with sensible settings.

HDR and colour

Both cards support 10-bit output, HDR and the same colour pipeline. Differences in image quality come from the display, not the card.

Practical numbers for planning a purchase

A few quick calculations help you decide.

Frame rate headroom

If your target is 144 frames per second at 1440p and the RTX 5070 Ti reaches 125 in your heaviest game, a 16 percent gain would deliver about 145. That is a case where the RTX 5080 changes the experience. If the RTX 5070 Ti already reaches 150, the extra headroom adds nothing you can see.

Energy and heat over a year

At 360 W against 300 W, a player who spends 10 hours a week gaming at full load uses about 31 extra kilowatt-hours across a year, since 60 W multiplied by 520 hours is 31.2 kilowatt-hours. At a hypothetical 30 pence per unit, that is under £10 a year. Heat in the room is the more noticeable effect in summer.

Supply headroom

Transient power spikes can exceed the rated figure briefly. A supply with ample margin avoids shutdowns, and a quality unit with a modern connector is worth the money. The guide to GPU power cables explains connectors.

Warranty and support

Both cards from the same partner carry similar warranty terms. Check the length and registration requirements on the retailer page.

Reading benchmark charts critically

Charts can mislead if you ignore their context.

Check the settings

Look at the resolution, the upscaling mode, whether ray tracing was on, the processor and the memory used. A chart at 1080p with a slow processor will compress differences that appear at 4K.

Look beyond averages

Seek 1% lows and frame-time graphs. A card that is 10 percent faster on average but has poorer lows may feel worse.

Compare like with like

Partner cards vary in clocks and cooling, so a factory overclocked RTX 5070 Ti may beat a reference model by a few percent. Compare the same tier of partner design when you can.

Watch for outliers

One unusual game can swing an average. Prefer reviews with many titles and a median figure.

Who should not buy either

Honest limits protect your money.

If you play at 1080p

At 1080p, either card is likely to be limited by the processor in many games. A cheaper card in the family can reach your target for less money, as the RTX 5070 complete guide explains.

If you need more than 16 GB

Large AI models, heavy video editing with big timelines and extreme texture mods can exceed 16 GB. In that case, consider the RTX 5090 with 32 GB, and read the RTX 5090 power consumption guide before you plan the supply.

Upgrade paths and resale

Think beyond the purchase.

Moving up from older generations

An RTX 3070 or 3080 owner gains a large step with either card, plus DLSS 4 and Multi Frame Generation. The RTX 4070 Ti Super owner has a smaller step. On the site's chart, the RTX 4080 Super scores 59, close to the RTX 5070 Ti at 57, so that upgrade is mainly for features, not raw speed.

Resale

Higher-tier cards tend to hold more absolute value, and used prices change quickly. Do not rely on resale to justify a purchase.

Future workloads

Newer games raise their requirements over time. The RTX 5080's extra compute buys somewhat more time before settings must drop, though the shared 16 GB limits both.

A decision checklist

Answer these questions in order.

Question one: what is your target?

Write down resolution, refresh rate and the games you play. If the RTX 5070 Ti reaches the target in test results, stop there.

Question two: how big is the premium?

Compute the cost per point and the marginal cost per extra point. If the marginal cost is more than double the average, the premium is steep.

Question three: what can your system support?

Check supply capacity, case clearance, airflow and processor. A weak link in any of these removes the benefit of the faster card.

Question four: do you tune?

If you enjoy undervolting, an RTX 5080 tuned for efficiency can be excellent. If you prefer to install and play, the stock RTX 5070 Ti is easier.

Summary

The RTX 5070 Ti and RTX 5080 share the GB203 die, 16 GB of GDDR7 and a 256-bit bus. The RTX 5080 adds 14 SMs, about 7 percent more bandwidth and 60 W of rated power for roughly 16 percent more performance on the relative chart used by this site. Choose the RTX 5070 Ti for value, lower power and 1440p or DLSS-assisted 4K, and choose the RTX 5080 if you need the headroom for high-refresh 4K or heavy ray tracing and the price premium is small. Use the cost-per-point method with current UK prices, check your supply and case, and verify performance in your own games.

Frequently asked questions about the RTX 5070 Ti and RTX 5080

Is the RTX 5080 much faster than the RTX 5070 Ti?

On the relative chart used by this site, the RTX 5080 scores 66 against 57, which is about 16 percent higher. It has 20 percent more SMs and a 7 percent bandwidth advantage. The gap is meaningful at 4K and in heavy ray tracing, and smaller where the processor limits frame rate.

Do the RTX 5070 Ti and RTX 5080 have the same VRAM?

Yes. Both have 16 GB of GDDR7 on a 256-bit bus. The RTX 5080 runs the memory faster, so it offers 960 GB/s compared with 896 GB/s, but capacity is identical, so VRAM-limited situations affect both cards equally. The matching capacity means texture limits appear at the same point on both.

Which is better for 4K gaming?

The RTX 5080 has more headroom, which helps at 4K, particularly with ray tracing. Both cards rely on DLSS for heavy games at 4K. If price is a concern, the RTX 5070 Ti with DLSS Balanced or Performance is a strong 4K option.

Is the RTX 5080 worth the extra money?

It depends on the price gap and your target. Divide each card's price by its relative score to compare value. If the RTX 5080 costs much more per point, the RTX 5070 Ti is better value. If the premium is small, the extra headroom is attractive.

Do both cards support Multi Frame Generation?

Yes, both support the full DLSS 4 feature set, including Multi Frame Generation, Ray Reconstruction and Reflex. The RTX 5080 has more Tensor and RT cores, so it has more headroom to run them at higher settings. Each card also supports Reflex, so you can pair generation with lower latency.

Can I overclock the RTX 5070 Ti to match an RTX 5080?

No. A typical overclock gains a few percent, while the RTX 5080 has about 16 percent more performance. You can narrow the gap slightly, but you cannot close it, and the RTX 5070 Ti's lower power limit also constrains it.