RTX 4070 Super vs Used RTX 3080 Ti: New Tech vs Flagship Raw Power for £450–£550
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In the £450 to £550 enthusiast price bracket in the UK, gamers face one of the most intriguing dilemmas in modern PC building: do you buy a modern mid-tier Ada Lovelace card—the GeForce RTX 4070 Super 12GB—or harness the monstrous raw hardware specs of a former £1,049 flagship on the second-hand market—the GeForce RTX 3080 Ti 12GB?
The RTX 3080 Ti boasts a colossal 384-bit memory bus pushing 912 GB/s of bandwidth, 10,240 CUDA cores, and industrial triple-slot cooling. Meanwhile, the RTX 4070 Super counters with high-density TSMC 4N silicon, a massive 36MB L2 cache, 3rd Gen RT cores, and proprietary DLSS 3 Frame Generation, all while sipping just 220W compared to the 3080 Ti's thirsty 350W TDP.
Silicon Specifications Compared
| Specification | RTX 4070 Super 12GB | RTX 3080 Ti 12GB |
|---|---|---|
| Architecture & Node | Ada Lovelace (TSMC 4N 5nm) | Ampere (Samsung 8nm) |
| CUDA Cores | 7,168 Cores | 10,240 Cores (+42%) |
| Memory Bus & Bandwidth | 192-bit / 504 GB/s (+36MB L2 Cache) | 384-bit / 912 GB/s (+80%) |
| Rated Board Power (TDP) | 220 Watts (Super efficient) | 350 Watts (Space heater) |
| DLSS Frame Generation | Yes (Hardware Optical Flow) | No (DLSS 2 / 3.5 only) |
| UK Second-Hand Price | £480 – £540 | £400 – £460 |
Head-to-Head Gaming Benchmarks
Tested on an AMD Ryzen 7 7800X3D rig with 32GB DDR5-6000 under Windows 11:
| Game & Settings | Resolution | RTX 3080 Ti | RTX 4070 Super | Analysis |
|---|---|---|---|---|
| Cyberpunk 2077 (Ultra, DLSS Quality) | 1440p | 84 FPS | 92 FPS | +9.5% (4070S) |
| Cyberpunk 2077 (RT Overdrive + FG) | 1440p | 38 FPS | 78 FPS | +105% (FG on 4070S) |
| Alan Wake 2 (High, DLSS Q) | 1440p | 68 FPS | 74 FPS | +8.8% (4070S) |
| Forza Horizon 5 (Extreme) | 1440p | 142 FPS | 154 FPS | +8.4% (4070S) |
| Red Dead Redemption 2 (Favor Quality) | 4K | 74 FPS | 72 FPS | +2.7% (3080 Ti Bandwidth) |
| Total War: Warhammer III (Ultra) | 4K | 58 FPS | 56 FPS | +3.5% (3080 Ti Bandwidth) |
At 1440p, the RTX 4070 Super edges out the 3080 Ti by 8% to 10% in native rasterization, thanks to higher boost clocks (2475MHz vs 1665MHz) and enormous L2 cache hit rates. In native 4K, the 3080 Ti's massive 384-bit bus flexes its muscles, regaining a slight 2% to 4% lead. But activate Frame Generation in titles like Cyberpunk 2077 or Flight Simulator, and the 4070 Super completely leaves the 3080 Ti in the dust.
Power Draw, Thermals & UK Electricity Reality
If you game 3 hours a day in the UK, that 130W difference equals roughly 142 kWh per year—adding £37 to £42 every year to your domestic electricity bill. Over two years of ownership, the running cost eats away most of the used 3080 Ti's upfront price discount!
Frequently Asked Questions
Does the RTX 4070 Super require the new 12VHPWR cable?
Yes, but all retail RTX 4070 Super cards include a 2x 8-pin PCIe to 16-pin 12VHPWR adapter in the box. Because the card only draws 220W (well below the 600W rating of the connector), connector melting issues seen on the RTX 4090 are nonexistent.
Is 12GB VRAM enough for 1440p gaming in 2026?
Yes. 12GB remains the sweet spot for 1440p ultra settings. Both cards carry 12GB of GDDR6X, ensuring identical texture buffer capacity in modern AAA titles.
Which card is better for Blender and 3D rendering?
The RTX 4070 Super is superior in Blender Cycles due to its 3rd-Gen RT cores and Shader Execution Reordering (SER), rendering scenes roughly 15% to 20% faster than the 3080 Ti despite having fewer total CUDA cores.
Trade RTX 40 & 30-Series GPUs on Koukan
Upgrade your graphics card with escrow payment security. Test benchmarks, monitor temperatures, and verify frame rates before payment is finalized.
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